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For logging out a user from my website, I am redirecting the page to logout.php where I am using session_destroy() function. Even there also, logout functionality is not working without session_start() function. By adding session_start() function before session_destroy() function, I am able to logout the user successfully.
Why do I need to use session_start() function everytime and in every page where I am doing something related to sessions?
session_destroy() destroys the active session. If you do not initialized the session, there will be nothing to be destroyed.